In this chapter, we presented an overview of the Linux filesystem. We started with a short introduction on filesystems in general, before explaining what is unique about the Linux filesystem. Ext4, XFS, and Btrfs filesystem implementations were discussed, together with the journaling feature of these filesystems. Next, the FHS that Linux adheres to was explained in high level, before focusing on the more important parts of the Linux filesystem in detail. This was done by exploring parts of the tree structure that makes up the Linux filesystem. We explained that different filesystems can be used side by side, by mounting them somewhere inside the tree. We ended the chapter by explaining that (almost) everything on Linux is handled as a file, and we discussed the different file types that are used.
The following commands were introduced in this chapter: pwd, cd, df, echo...
